Abbe number

Okay kiddo, let me explain what an Abbe Number is. Abbe number is a way to describe how light moves through different materials, like glasses.

You might have seen how different glasses can make things look bigger, smaller, or even turned upside down! This is because of the way light moves through them.

Now, Abbe number is a measure of how different colors of light bend when they pass through a material. See, light is actually made up of different colors like red, blue, and green.

Some materials can bend all the colors of light by the same amount, while others might bend certain colors more than others. This affects the way we see things through the material.

So, the Abbe number tells us how much one color of light (blue, for example) will be bent compared to another color of light (like red) when passing through the material.

It's a bit complicated, but think of it like this - imagine trying to throw different balls (like a basketball and a baseball) through a hoop. If one ball is bigger, it might be harder to get it to fit through the hoop. The Abbe number tells us how much bigger one type of ball is compared to another when trying to get through the same hoop.

I hope that helps explain Abbe number in a way you can understand!